Spring Integration ftp inbound channel adapter recursive synchronization - recursion

Question

With Spring Integration, is it possible to synchronize files (including subfolder's files) recursively using ftp inbound channel adapter?

Answer 1

No; but you can fetch a complete remote directory tree with recursive MGET with the outbound gateway...
#SpringBootApplication
#IntegrationComponentScan
public class So42324318Application {
public static void main(String[] args) {
ConfigurableApplicationContext context = SpringApplication.run(So42324318Application.class, args);
List<File> files = context.getBean(Gateway.class).fetchFiles("foo/*");
System.out.println(files);
context.close();
}
#MessagingGateway(defaultRequestChannel = "fetchRecursive")
public interface Gateway {
public List<File> fetchFiles(String remoteDir);
}
#Bean
#ServiceActivator(inputChannel = "fetchRecursive")
public FtpOutboundGateway gateway() {
// Create a recursive MGET gateway that gets the remote directory from the payload
FtpOutboundGateway gateway = new FtpOutboundGateway(sessionFactory(), "mget", "payload");
gateway.setOptions("-R");
gateway.setLocalDirectoryExpression(new SpelExpressionParser().parseExpression("#remoteDirectory"));
return gateway;
}
#Bean
public SessionFactory<FTPFile> sessionFactory() {
return new CachingSessionFactory<>(ftpSF());
}
private SessionFactory<FTPFile> ftpSF() {
DefaultFtpSessionFactory sf = new DefaultFtpSessionFactory();
sf.setHost("10.0.0.3");
sf.setUsername("ftptest");
sf.setPassword("ftptest");
sf.setClientMode(FTPClient.PASSIVE_LOCAL_DATA_CONNECTION_MODE);
return sf;
}
}
Result:
2017-02-19 09:55:09.351 INFO 61921 --- [ main] o.s.integration.ftp.session.FtpSession : File has been successfully transferred from: foo/bar.tx
2017-02-19 09:55:09.353 INFO 61921 --- [ main] o.s.integration.ftp.session.FtpSession : File has been successfully transferred from: foo/bar.txt
2017-02-19 09:55:09.356 INFO 61921 --- [ main] o.s.integration.ftp.session.FtpSession : File has been successfully transferred from: foo/bar/abc.txt
2017-02-19 09:55:09.358 INFO 61921 --- [ main] o.s.integration.ftp.session.FtpSession : File has been successfully transferred from: foo/baz.txt
2017-02-19 09:55:09.362 INFO 61921 --- [ main] o.s.integration.ftp.session.FtpSession : File has been successfully transferred from: foo/foo/bar/qux.txt
2017-02-19 09:55:09.364 INFO 61921 --- [ main] o.s.integration.ftp.session.FtpSession : File has been successfully transferred from: foo/foo/baz/fiz.txt
[foo/bar.tx, foo/bar.txt, foo/bar/abc.txt, foo/baz.txt, foo/foo/bar/qux.txt, foo/foo/baz/fiz.txt]